Assiduous
showing great care, attention, and effort : marked by careful unremitting attention or persistent application
Merrian-Webster Dictionary online
Adjective: assiduous
Adverb: assiduously
Noun: assiduousness
showing great care, attention, and effort : marked by careful unremitting attention or persistent application
Merrian-Webster Dictionary online
Adjective: assiduous
Adverb: assiduously
Noun: assiduousness